<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row
        ><el-col
          ><el-button type="primary" @click="showAddCteDialog"
            >添加分类</el-button
          ></el-col
        ></el-row
      >
      <!-- 表格 -->
      <tree-table
        :show-index="true"
        index-text="#"
        :data="cateList"
        :columns="columns"
        :expandType="false"
        :selectionType="false"
        border
        :showRowHover="false"
        class="treeTable"
      >
        <!-- 是否有效 -->
        <template slot="isOk" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: green"
          ></i>
          <i class="el-icon-error" style="color: red" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0" size="mini">一级</el-tag>
          <el-tag
            v-else-if="scope.row.cat_level === 1"
            size="mini"
            type="success"
            >二级</el-tag
          >
          <el-tag v-else size="mini" type="warning">三级</el-tag>
        </template>
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit"
            >编辑</el-button
          >
          <el-button size="mini" type="danger" icon="el-icon-delete"
            >删除</el-button
          >
        </template>
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="this.total"
      >
      </el-pagination>
    </el-card>
    <!-- 分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCteDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 分类表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <el-cascader
            v-model="selectKeys"
            :options="parentCateList"
            expandTrigger="hover"
            :props="cascaderProps"
            @change="parentCateChange"
            clearable
            change-on-select
          ></el-cascader
        ></el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCteDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Cate',
  data() {
    return {
      //查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      cateList: [],
      total: 0,
      //table列的定义
      columns: [
        { label: '名称', prop: 'cat_name' },
        { label: '是否有效', type: 'template', template: 'isOk' },
        { label: '排序', type: 'template', template: 'order' },
        { label: '操作', type: 'template', template: 'opt' },
      ],
      //分类对话框的显示隐藏
      addCteDialogVisible: false,
      //分类的表单数据对象
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0,
      },
      //验证规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ],
      },
      parentCateList: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      selectKeys: [],
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取商品数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo,
      })
      if (res.meta.status !== 200)
        return this.$message.error('获取商品数据失败')
      //数据列表负值给cateList
      this.cateList = res.data.result
      //总数据条数负值
      this.total = res.data.total
    },
    //监听pageSize
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCteDialog() {
      this.getParentCateList()
      this.addCteDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 },
      })
      if (res.meta.status !== 200)
        return this.$message.error('获取父级分类失败')
      this.parentCateList = res.data
    },
    parentCateChange() {
      if (this.selectKeys.length > 0) {
        //父级分类的id
        this.addCateForm.cat_pid = this.selectKeys[this.selectKeys.length - 1]
        this.addCateForm.cat_level = this.selectKeys.length
        return
      }
      //分类等级复制
      else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) return this.$message.error('添加分类失败')
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCteDialogVisible = false
      })
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
  },
}
</script>

<style>
.treeTable {
  margin-top: 20px;
}
.el-cascader {
  width: 100%;
}
</style>